Description: An internal database is a data storage system that is used exclusively within an application or system, without being accessible from the outside. These databases are fundamental for efficient information management, allowing applications to store, retrieve, and manipulate data quickly and effectively. They are often implemented in environments where security and access control are paramount, as sensitive data should not be exposed to unauthorized users. Internal databases can be relational or NoSQL, depending on the nature of the data and the needs of the application. In the NoSQL context, these databases are particularly useful for handling large volumes of unstructured or semi-structured data, offering flexibility in how data is stored and queried. Additionally, they tend to be scalable, allowing organizations to adapt to a continuous growth of information without compromising performance. In summary, internal databases are a key component in modern software architecture, facilitating secure and efficient data management.